| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F |
| 1990 Hardiness Zone: | Zone 9a: 20F to 25F |
| Average First Frost Date: | Dec. 11 - Dec. 20 |
| Average Last Frost Date: | Feb. 1 - Feb. 10 |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate |
| Ecoregion: | |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 95355 - Modesto, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 39 | 43 | 45 | 48 | 53 | 58 | 61 | 60 | 57 | 51 | 43 | 38 | 50 |
| Avg Max Temp (°F) | 54 | 62 | 67 | 74 | 81 | 88 | 93 | 92 | 88 | 78 | 64 | 55 | 75 |
| Avg Precip (In.) | 2.6 | 2.39 | 2.35 | .9 | .51 | .12 | .05 | .06 | .27 | .76 | 1.54 | 1.71 | 13.27 |